body {
    font-family: Arial, sans-serif;
    margin: 20px;
}

h1 {
    text-align: center;
}

.category {
    margin-bottom: 20px;
    border: 1px solid #ccc;
    padding: 10px;
    border-radius: 5px;
}

h2 {
    margin-top: 0;
}

button {
    margin: 5px;
    padding: 10px 20px;
    background-color: #007BFF;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #0056b3;
}